Malicious PDF — malware analysis report

Static analysis result for SHA-256 7271414581236284…

MALICIOUS

PDF

235.8 KB Created: 2010-02-22 19:20:30 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: db8200787fef234eedad11461023c6c7 SHA-1: cfa73df5931a6bc023eefd9f8472302f0aa2c556 SHA-256: 72714145812362842a33a67c84901d60634cb749875b3581e0c8173bab7e1ee6
132 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-19990 and a machine learning classifier indicated a high probability of maliciousness. It contains a hidden iframe pointing to external URLs, suggesting it is designed to download and execute a second-stage payload. The embedded URLs are suspicious and likely serve as the distribution points for the malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9482

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-19990 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-19990
  • PDF contains hidden external HTML iframe high PDF_HIDDEN_HTML_IFRAME
    PDF bytes contain a hidden zero-size HTML iframe pointing to an external HTTP(S) URL. This is a strong malicious dropper/redirect indicator and is not expected in ordinary PDF content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fuadrenal.com/lib/index.php
    • http://reycross.com/lib/index.php
    • http://odmarco.com/lib/index.php
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000b9ed.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB9ED 264072 bytes

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